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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.24 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.50 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

268 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.020

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.24 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

4.87 s

Page Load Progression

576 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.0 s
4.6 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
5.8 MB transferred, 93 requests
FIX
5.8 MB transferred, 93 requests
Critical::
Page weighs 11.6 MB (5.8 MB transferred)
Warning::
JavaScript is 2.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.1 MB
Info::
93 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.8 MB / 2.4 MB budget
5.8 MB transferred
93 requests
1.2 g CO2 per page load
Other 3.2 MiB 56%
JavaScript 2.1 MiB 36%
Images 194.8 KiB 3%
Fonts 135.2 KiB 2%
CSS 88.8 KiB 2%
HTML 64.5 KiB 1%
Other 16.9 KiB 0%
Other 6.5 KiB 0%
Other 1.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (5.8 MiB of 5.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
25 scripts, 1003 KB unused
FIX
25 scripts, 1003 KB unused
Warning::
https://static-web.grammarly.com/cms/master/_next/...: 320 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static-web.grammarly.com/cms/master/_next/...: 103 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static-web.grammarly.com/cms/master/_next/...: 72 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://accounts.google.com/gsi/client: 72 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CBK9...: 68 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1003 KB
1003 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static-web.grammarly.com/cms/master/_next/static/chunks/516-effdeff0fc841817.js493 KB320 KB (65%)✓3rd
https://static-web.grammarly.com/cms/master/_next/static/chunks/17-e2c0c030cf58c736.js163 KB103 KB (63%)✓3rd
https://static-web.grammarly.com/cms/master/_next/static/chunks/cb702229-59bc8fe8570d0ac7.js120 KB72 KB (60%)✓3rd
https://accounts.google.com/gsi/client96 KB72 KB (75%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CBK9K2ZWWE&l=dataLayerAt1333&cx=c&gtm=4e64f0168 KB68 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-956476927&l=dataLayerAt1333&cx=c&gtm=4e64f0147 KB65 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-10353179&l=dataLayerAt1333&cx=c&gtm=4e64f0131 KB63 KB (48%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-10353176&l=dataLayerAt1333&cx=c&gtm=4e64f0131 KB63 KB (48%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NQ3XB9&l=dataLayerAt1333201 KB59 KB (29%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-11910764&l=dataLayerAt1333&cx=c&gtm=4e64f0131 KB58 KB (44%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
93 resources · 5.8 MB · 1003 KB savings available
FIX
93 resources · 5.8 MB · 1003 KB savings available
Warning::
Page weight 4.8 MB over 1MB target
Got: 5.8 MB Expected: ≤ 1 MB
Info::
~1003 KB of savings available
Warning::
92 third-party resources (100% of weight)
Info::
4 resources over 200KB
93 resources · 5.8 MiB · 92 third-party 4.8 MiB over 1MB target
Media 56% · 3.2 MiB
JavaScript 36% · 2.1 MiB
Image 4% · 210.5 KiB
Font 2% · 135.2 KiB
CSS 2% · 88.8 KiB
Document 1% · 65.7 KiB
Other 0% · 7.8 KiB

~1003.0 KiB of savings available

Remove unused JavaScript: 1003.0 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: max-age=0, no-store, no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, no-store, no-cache

DirectiveValueMeaning
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
B
Image Optimization
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 195 KB
0 oversized -0 KB
19 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

C
JS Execution Cost
Action
1240ms total JS execution
REVIEW
1240ms total JS execution
Warning::
https://static-web.grammarly.com/cms/master/_next/...: 323ms CPU time
Info::
https://www.grammarly.com/: 227ms CPU time
Info::
Unattributable: 185ms CPU time
Info::
https://static-web.grammarly.com/cms/master/_next/...: 160ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-NQ3...: 158ms CPU time
Warning::
Third-party scripts: 1240ms (100% of total)

Main Thread Breakdown

Script Evaluation 60% Other 16% Script Parsing & Compilation 9% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://static-web.grammarly.com/cms/master/_next/static/chunks/framework-18871a3a7164e80f.js323ms293ms4ms3rd
https://www.grammarly.com/227ms8ms1ms3rd
Unattributable185ms7ms0ms3rd
https://static-web.grammarly.com/cms/master/_next/static/chunks/pages/render-18b58af021878656.js160ms156ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NQ3XB9&l=dataLayerAt1333158ms132ms15ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CBK9K2ZWWE&l=dataLayerAt1333&cx=c&gtm=4e64f075ms57ms11ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-11910764&l=dataLayerAt1333&cx=c&gtm=4e64f057ms49ms5ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-956476927&l=dataLayerAt1333&cx=c&gtm=4e64f055ms43ms11ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
4 fonts (135 KB)
PASS
4 fonts (135 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

135 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.2 s LCP 2.5 shttps://static-web.grammarly.com/shared/fonts/matter-medium.woff2matter-medium.woff2 https://static-web.grammarly.com/shared/fonts/matter-medium.woff2 — 31.6 KiB — 80 ms — font-display: swaphttps://static-web.grammarly.com/shared/fonts/matter-semi-bold.woff2matter-semi-bold.woff2 https://static-web.grammarly.com/shared/fonts/matter-semi-bold.woff2 — 31.4 KiB — 86 ms — font-display: swaphttps://static-web.grammarly.com/shared/fonts/glyph-regular.woff2glyph-regular.woff2 https://static-web.grammarly.com/shared/fonts/glyph-regular.woff2 — 35.9 KiB — 97 ms — font-display: swaphttps://static-web.grammarly.com/shared/fonts/glyph-bold.woff2glyph-bold.woff2 https://static-web.grammarly.com/shared/fonts/glyph-bold.woff2 — 36.3 KiB — 101 ms — font-display: swap
matter-medium.woff2 woff2 swap
Size 32 KB
Load time 80 ms
Start 401 ms
Risk FOUT — text flashes from fallback to web font
matter-semi-bold.woff2 woff2 swap
Size 31 KB
Load time 86 ms
Start 402 ms
Risk FOUT — text flashes from fallback to web font
glyph-regular.woff2 woff2 swap
Size 36 KB
Load time 97 ms
Start 404 ms
Risk FOUT — text flashes from fallback to web font
glyph-bold.woff2 woff2 swap
Size 36 KB
Load time 101 ms
Start 404 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
93 requests over 2312ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.2 s LCP 2.5 shttps://grammarly.com// https://grammarly.com/ — 301 — 442 B — 160 ms — h2https://www.grammarly.com/www.grammarly.com/ https://www.grammarly.com/ — 200 — 64.5 KiB — 249 ms — h2https://static-web.grammarly.com/shared/fonts/matter-medium.woff2static-web.grammarly.com/shared/fon... https://static-web.grammarly.com/shared/fonts/matter-medium.woff2 — 200 — 31.6 KiB — 80 ms — h2https://static-web.grammarly.com/shared/fonts/matter-semi-bold.woff2static-web.grammarly.com/shared/fon... https://static-web.grammarly.com/shared/fonts/matter-semi-bold.woff2 — 200 — 31.4 KiB — 86 ms — h2https://static-web.grammarly.com/shared/fonts/glyph-regular.woff2static-web.grammarly.com/shared/fon... https://static-web.grammarly.com/shared/fonts/glyph-regular.woff2 — 200 — 35.9 KiB — 97 ms — h2https://static-web.grammarly.com/shared/fonts/glyph-bold.woff2static-web.grammarly.com/shared/fon... https://static-web.grammarly.com/shared/fonts/glyph-bold.woff2 — 200 — 36.3 KiB — 101 ms — h2https://static-web.grammarly.com/1e6ajr2k4140/4hOYb9UtTVpuNkpWZDT5X0/6787ede583db2d065aa98649d3400dff/Column_1.png?w=640&fm=webpstatic-web.grammarly.com/1e6ajr2k41... https://static-web.grammarly.com/1e6ajr2k4140/4hOYb9UtTVpuNkpWZDT5X0/6787ede583db2d065aa98649d3400dff/Column_1.png?w=640&fm=webp — 200 — 20.5 KiB — 80 ms — h2https://static-web.grammarly.com/cms/master/_next/static/css/21a09db180a1580a.cssstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/css/21a09db180a1580a.css — 200 — 22.2 KiB — 68 ms — h2https://static-web.grammarly.com/cms/master/_next/static/css/3540ba9e956cf59a.cssstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/css/3540ba9e956cf59a.css — 200 — 25.1 KiB — 86 ms — h2https://static-web.grammarly.com/cms/master/_next/static/css/7566b533fcf855c8.cssstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/css/7566b533fcf855c8.css — 200 — 36.5 KiB — 91 ms — h2https://transcend-cdn.com/cm/1c1f8e90-47d0-4bba-a1a2-472d59b002a2/airgap.jstranscend-cdn.com/cm/1c1f8e90-47d0-... https://transcend-cdn.com/cm/1c1f8e90-47d0-4bba-a1a2-472d59b002a2/airgap.js — 200 — 53.2 KiB — 92 ms — h3https://accounts.google.com/gsi/clientaccounts.google.com/gsi/client https://accounts.google.com/gsi/client — 200 — 96.2 KiB — 211 ms — h2https://www.grammarly.com/api/tracking/load?pageSlug=/&isInitial=true&pageId=&userId=-385748632793527296&requestId=gjLkQ6gyQekkONP6RbRV&containerId=ovwramjkapr40d02www.grammarly.com/api/tracking/load... https://www.grammarly.com/api/tracking/load?pageSlug=/&isInitial=true&pageId=&userId=-385748632793527296&requestId=gjLkQ6gyQekkONP6RbRV&containerId=ovwramjkapr40d02 — 200 — 401 B — 115 ms — h2https://www.grammarly.com/api/tracking/assign?pageSlug=/&isInitial=true&pageId=&userId=-385748632793527296&requestId=gjLkQ6gyQekkONP6RbRV&containerId=ovwramjkapr40d02www.grammarly.com/api/tracking/assi... https://www.grammarly.com/api/tracking/assign?pageSlug=/&isInitial=true&pageId=&userId=-385748632793527296&requestId=gjLkQ6gyQekkONP6RbRV&containerId=ovwramjkapr40d02 — 200 — 403 B — 124 ms — h2https://static-web.grammarly.com/1e6ajr2k4140/ew5WGXQVNQcO0nSN47lC1/1f470b2ef58daa8bcd5b81dcaeffdd2f/Brand_Zoom__Type_Corporations__Mode_Light.svgstatic-web.grammarly.com/1e6ajr2k41... https://static-web.grammarly.com/1e6ajr2k4140/ew5WGXQVNQcO0nSN47lC1/1f470b2ef58daa8bcd5b81dcaeffdd2f/Brand_Zoom__Type_Corporations__Mode_Light.svg — 200 — 2.7 KiB — 34 ms — h2https://static-web.grammarly.com/1e6ajr2k4140/4WUOpJleQHBPlOCvXFHD7H/2107d4495a40cea61f5b837f07953db7/Brand_Databricks__Type_Corporations__Mode_Light.svgstatic-web.grammarly.com/1e6ajr2k41... https://static-web.grammarly.com/1e6ajr2k4140/4WUOpJleQHBPlOCvXFHD7H/2107d4495a40cea61f5b837f07953db7/Brand_Databricks__Type_Corporations__Mode_Light.svg — 200 — 4.9 KiB — 35 ms — h2https://static-web.grammarly.com/1e6ajr2k4140/69zYhPmc91hoHizA4Dm4qR/6dea4ff0807974f168c0d917b351e7e2/LogoClients.svgstatic-web.grammarly.com/1e6ajr2k41... https://static-web.grammarly.com/1e6ajr2k4140/69zYhPmc91hoHizA4Dm4qR/6dea4ff0807974f168c0d917b351e7e2/LogoClients.svg — 200 — 2.3 KiB — 39 ms — h2https://static-web.grammarly.com/1e6ajr2k4140/2ZLIHLDow6103GH2mfjbGT/16016623215b548ffd12a6460b44b4ed/LogoClients.svgstatic-web.grammarly.com/1e6ajr2k41... https://static-web.grammarly.com/1e6ajr2k4140/2ZLIHLDow6103GH2mfjbGT/16016623215b548ffd12a6460b44b4ed/LogoClients.svg — 200 — 1.7 KiB — 37 ms — h2https://static-web.grammarly.com/web-heartbeat/latest/index.jsstatic-web.grammarly.com/web-heartb... https://static-web.grammarly.com/web-heartbeat/latest/index.js — 200 — 1.9 KiB — 36 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/125.9370fe004c6de1c5.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/125.9370fe004c6de1c5.js — 200 — 1.3 KiB — 42 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/webpack-0b3db51c0ac885df.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/webpack-0b3db51c0ac885df.js — 200 — 3.3 KiB — 40 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/framework-18871a3a7164e80f.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/framework-18871a3a7164e80f.js — 200 — 54.4 KiB — 51 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/main-a1ca2a318bff5472.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/main-a1ca2a318bff5472.js — 200 — 36.2 KiB — 47 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/pages/_app-0059e1bcc1031fec.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/pages/_app-0059e1bcc1031fec.js — 200 — 40.6 KiB — 80 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/cb702229-59bc8fe8570d0ac7.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/cb702229-59bc8fe8570d0ac7.js — 200 — 120.5 KiB — 58 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/1a192442-e4e5b1da91b22ec4.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/1a192442-e4e5b1da91b22ec4.js — 200 — 20.1 KiB — 47 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/516-effdeff0fc841817.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/516-effdeff0fc841817.js — 200 — 493.3 KiB — 114 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/17-e2c0c030cf58c736.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/17-e2c0c030cf58c736.js — 200 — 163.5 KiB — 110 ms — h2https://static-web.grammarly.com/cms/master/_next/static/chunks/pages/render-18b58af021878656.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/chunks/pages/render-18b58af021878656.js — 200 — 1.4 KiB — 62 ms — h2https://static-web.grammarly.com/cms/master/_next/static/xJlU194TA9XLS801IftgH/_buildManifest.jsstatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/_next/static/xJlU194TA9XLS801IftgH/_buildManifest.js — 200 — 1.2 KiB — 69 ms — h2
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h2https://gnar.grammarly.com/eventsgnar.grammarly.com/events https://gnar.grammarly.com/events — 200 — 267 B — 309 ms — h2https://gnar.grammarly.com/eventsgnar.grammarly.com/events https://gnar.grammarly.com/events — 200 — 267 B — 309 ms — h2https://gnar.grammarly.com/eventsgnar.grammarly.com/events https://gnar.grammarly.com/events — 200 — 267 B — 310 ms — h2https://gnar.grammarly.com/eventsgnar.grammarly.com/events https://gnar.grammarly.com/events — 200 — 267 B — 308 ms — h2https://f-log-at.grammarly.io/logf-log-at.grammarly.io/log https://f-log-at.grammarly.io/log — 200 — 338 B — 129 ms — h2https://f-log-at.grammarly.io/logf-log-at.grammarly.io/log https://f-log-at.grammarly.io/log — 200 — 338 B — 129 ms — h2https://gateway.grammarly.com/experimentation/treatment/loggateway.grammarly.com/experimentati... https://gateway.grammarly.com/experimentation/treatment/log — 200 — 771 B — 307 ms — h2https://gateway.grammarly.com/experimentation/treatment/loggateway.grammarly.com/experimentati... https://gateway.grammarly.com/experimentation/treatment/log — 200 — 772 B — 305 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-956476927&l=dataLayerAt1333&cx=c&gtm=4e64f0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-956476927&l=dataLayerAt1333&cx=c&gtm=4e64f0 — 200 — 147.1 KiB — 113 ms — h2https://www.googletagmanager.com/gtag/js?id=DC-10353176&l=dataLayerAt1333&cx=c&gtm=4e64f0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=DC-10353176&l=dataLayerAt1333&cx=c&gtm=4e64f0 — 200 — 130.8 KiB — 123 ms — h2https://www.googletagmanager.com/gtag/js?id=DC-10353179&l=dataLayerAt1333&cx=c&gtm=4e64f0www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=DC-10353179&l=dataLayerAt1333&cx=c&gtm=4e64f0 — 200 — 130.8 KiB — 123 ms — 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h3https://pagead2.googlesyndication.com/ccm/collect?rcb=14&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45be64f0v9101027542z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266401~118131810&apve=1&apvf=f&apvc=0&tids=AW-956476927&tid=AW-956476927&tft=1776360565167&tfd=1711pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=14&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45be64f0v9101027542z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266401~118131810&apve=1&apvf=f&apvc=0&tids=AW-956476927&tid=AW-956476927&tft=1776360565167&tfd=1711 — 200 — 21 B — 81 ms — h3https://pagead2.googlesyndication.com/ccm/collect?rcb=14&frm=0&ae=g&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&_tu=CA&gtm=45be64f0v9101027542z871625002za20gzb71625002zd71625002xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266401~118131810&apve=1&apvf=f&apvc=0&tids=AW-956476927&tid=AW-956476927&tft=1776360565168&tfd=1712pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=14&frm=0&ae=g&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&_tu=CA&gtm=45be64f0v9101027542z871625002za20gzb71625002zd71625002xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266401~118131810&apve=1&apvf=f&apvc=0&tids=AW-956476927&tid=AW-956476927&tft=1776360565168&tfd=1712 — 200 — 21 B — 81 ms — h3https://pagead2.googlesyndication.com/ccm/collect?rcb=17&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45fe64f0v9177105537z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616985~115938466~115938469~117266401~117384406&apve=1&apvf=f&apvc=0&tids=DC-10353179&tid=DC-10353179&tft=1776360565210&tfd=1754pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=17&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45fe64f0v9177105537z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616985~115938466~115938469~117266401~117384406&apve=1&apvf=f&apvc=0&tids=DC-10353179&tid=DC-10353179&tft=1776360565210&tfd=1754 — 200 — 21 B — 84 ms — h3https://pagead2.googlesyndication.com/ccm/collect?rcb=12&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45fe64f0v9177101180z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266400&apve=1&apvf=f&apvc=0&tids=DC-10353176&tid=DC-10353176&tft=1776360565245&tfd=1789pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=12&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&gtm=45fe64f0v9177101180z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938468~117266400&apve=1&apvf=f&apvc=0&tids=DC-10353176&tid=DC-10353176&tft=1776360565245&tfd=1789 — 200 — 21 B — 60 ms — h3https://pagead2.googlesyndication.com/ccm/collect?rcb=6&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&ep.user_data_mode=a&gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266400~118131808&apve=1&apvf=f&apvc=0&tids=DC-11910764&tid=DC-11910764&tft=1776360565289&tfd=1833pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=6&frm=0&en=page_view&dl=https%3A%2F%2Fwww.grammarly.com%2F&scrsrc=www.googletagmanager.com&rnd=449555979.1776360565&navt=n&npa=1&ep.user_data_mode=a&gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115938466~115938469~117266400~118131808&apve=1&apvf=f&apvc=0&tids=DC-11910764&tid=DC-11910764&tft=1776360565289&tfd=1833 — 200 — 21 B — 95 ms — h3https://ade.googlesyndication.com/ddm/activity/src=11910764;type=gramm0;cat=gramm0;rcb=6;ord=8682004191170;npa=1;uaa=x86;uab=64;uafvl=Chromium%3B147.0.7727.55%7CNot.A%252FBrand%3B8.0.0.0;uamb=0;uam=;uap=macOS;uapv=10.15.7;uaw=0;pscdl=denied;frm=0;user_data_mode=a;_tu=KFA;gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xea;gcs=G100;gcd=13p3p3p2p5l1;dma_cps=-;dma=1;dc_fmt=8;tag_exp=0~115938466~115938469~117266400~118131808;epver=2;~oref=https%3A%2F%2Fwww.grammarly.com%2F?ade.googlesyndication.com/ddm/activ... https://ade.googlesyndication.com/ddm/activity/src=11910764;type=gramm0;cat=gramm0;rcb=6;ord=8682004191170;npa=1;uaa=x86;uab=64;uafvl=Chromium%3B147.0.7727.55%7CNot.A%252FBrand%3B8.0.0.0;uamb=0;uam=;uap=macOS;uapv=10.15.7;uaw=0;pscdl=denied;frm=0;user_data_mode=a;_tu=KFA;gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xea;gcs=G100;gcd=13p3p3p2p5l1;dma_cps=-;dma=1;dc_fmt=8;tag_exp=0~115938466~115938469~117266400~118131808;epver=2;~oref=https%3A%2F%2Fwww.grammarly.com%2F? — 302 — 772 B — 165 ms — h2https://ade.googlesyndication.com/ddm/activity/src=11910764;dc_pre=CMm0-uPy8pMDFWhFkQUdFLgJqg;type=gramm0;cat=gramm0;rcb=6;ord=8682004191170;npa=1;uaa=x86;uab=64;uafvl=Chromium%3B147.0.7727.55%7CNot.A%252FBrand%3B8.0.0.0;uamb=0;uam=;uap=macOS;uapv=10.15.7;uaw=0;pscdl=denied;frm=0;user_data_mode=a;_tu=KFA;gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xea;gcs=G100;gcd=13p3p3p2p5l1;dma_cps=-;dma=1;dc_fmt=8;tag_exp=0~115938466~115938469~117266400~118131808;epver=2;~oref=https%3A%2F%2Fwww.grammarly.com%2F?ade.googlesyndication.com/ddm/activ... https://ade.googlesyndication.com/ddm/activity/src=11910764;dc_pre=CMm0-uPy8pMDFWhFkQUdFLgJqg;type=gramm0;cat=gramm0;rcb=6;ord=8682004191170;npa=1;uaa=x86;uab=64;uafvl=Chromium%3B147.0.7727.55%7CNot.A%252FBrand%3B8.0.0.0;uamb=0;uam=;uap=macOS;uapv=10.15.7;uaw=0;pscdl=denied;frm=0;user_data_mode=a;_tu=KFA;gtm=45fe64f0v9190729138z871625002za20gzb71625002zd71625002xea;gcs=G100;gcd=13p3p3p2p5l1;dma_cps=-;dma=1;dc_fmt=8;tag_exp=0~115938466~115938469~117266400~118131808;epver=2;~oref=https%3A%2F%2Fwww.grammarly.com%2F? — 200 — 118 B — 84 ms — h2https://accounts.google.com/gsi/styleaccounts.google.com/gsi/style https://accounts.google.com/gsi/style — 200 — 665 B — 39 ms — h2https://f-log-at.grammarly.io/logf-log-at.grammarly.io/log https://f-log-at.grammarly.io/log — 204 — 0 B — 99 ms — h2https://static-web.grammarly.com/cms/master/public/favicon.icostatic-web.grammarly.com/cms/master... https://static-web.grammarly.com/cms/master/public/favicon.ico — 200 — 15.7 KiB — 20 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1240ms · 767KB · $16/mo
static-web.grammarly.com
Other
Costly
Execution 323ms
Transfer 54 KB
Unused 42%
Monthly Cost $4/mo
www.grammarly.com
Other
Costly
Execution 227ms
Transfer 64 KB
Monthly Cost $3/mo
Unattributable
Other
Optional
Execution 185ms
Transfer 0 KB
Monthly Cost $2/mo
static-web.grammarly.com
Other
Optional
Execution 160ms
Transfer 1 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 158ms
Transfer 201 KB
Unused 29%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 75ms
Transfer 168 KB
Unused 41%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 131 KB
Unused 44%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 147 KB
Unused 44%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • static-web.grammarly.com adds 323ms and costs ~$4/month
  • www.grammarly.com adds 227ms and costs ~$3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

static-web.grammarly.com takes 323ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.grammarly.com takes 227ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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